Q2. (18/50) Spherical particles with diameters of 20,40 and 60m are injected to a vertical and large diameter pipe at the point of 1m from the pipe outlet (top). Water at 20C flows up at a velocity of 1cm/s. It is known that the particles have a mass distribution as follows: 30%20m; 50%40m and 20%60m. Assume Stokes applies at Re